1. MS03/B3. Sodium reacts with water as follows.
–2Na(s)
+ 2H2O(l) ®
2NaOH(aq) + H2(g)
1.15 g of
sodium is allowed to react completely with water. The resulting solution
is diluted to 250 cm3. Calculate the concentration, in mol dm–3,
of the resulting sodium hydroxide solution. [3]
2. MS03/B7. (i) Calcium carbonate is added to separate solutions
of hydrochloric acid and ethanoic acid of the same concentration.
State one similarity and one difference in the
observations you could make. [2]